Electrical system of distribution.



G. CROSBY.

ELECTRICAL SYSTEM OF DISTRIBUTION.

APPLICATION HL'ED MAY 12. I916.

Patentd Sept. 1917.-

' UNITED STATES PATENT GORHAM CROSBY, OF GLEN RIDGE, NEW JERSEY,ASSIGNOR- TO GOULD GOUFLER CUB? PANY, A CORPORATION OF NEW YORK.

ELECTRICAL SYSTEM OF DISTRIBUTION.

Specification of Letters Patent.

Application-filed May 12, 1916. Serial No. 96,986.

To all whom it may concern:

Be it known that I, Groiinnivr CROSBY, a citizen of the United States,and a resident of Glen Ridge, county of Essex, Stateof New Jersey, haveinvented certain new and useful Improvements in Electrical Systems ofDistribution, of which the following is a specification.

The invention relates to improvements in electrical systems ofdistribution and'more particularly to systems in which the generator isdriven at variable speed, is adapted to charge a storage battery, and,if desired, simultaneously supply translating devices. The main objectof the invention is to render more efficient and efiective such asystem, in which the generator voltage is snitably regulated, andresistance is applied in the circuit of the battery to regulate thecharging current. More specific objects, features and advantages willmore clearly ,appear from the detailed description given.

below, taken in connection with the accompanying drawings, which form apart of this specification. I

In the drawings, Figure 1 is a diagram illustrating a system embodyingthe improvements in one "form. 2 is a diagram showing a modification.

Referring to Fig. 1, 1 represents a main generator, 2 represents astorage battery, and 3 the lamps or other translating devices adapted tobe supplied from the generator 1. 4 represents ashunt field winding ofthe generator and 5 a carbon pile rheostat in series therewith, operatedby a lever 6 carry ing acore 7, controlled by a voltage coil 8 connectedacross the generator, and a volt-- age coil 9 connected across thebattery,-tl1e coil 9 being wound to oppose the coil 8. in series withthe battery in the battery circuit is a carbon pile variable resistance1%, controlled by a lever 11, carrying a core 1?, controlled by acurrent coil 13 in the battery circuit and a voltage coil 14 connected'across the carbon pile 10 and coil 13, so as to be responsive tochanges in drop in po-- tential in the carbon pile 10. 15 represents anautomatic main switch of any suitable or well-known kind, adapted toconnect generator to the storage battery and translating devices, whenthe generator has at tained suilicient speed. The main switch providedwith a back contact 16, adapted to close the shunt circuit 17 when themain switch opens, to shunt the coil 13. 18 re sents a carbon pilerheostat in circuit v the translating devices, operated by a lev 19,having a core 20,,controlled by a volt coil 21 connected across thetranslatin vices, to regulate the voltage applied to translatingdevices.

During the normal charge of the the battery back pressure remains substially constant; and the voltage of the a orator is maintainedsubstantially cons by the action of the voltage coil 8 regulating meansShould. the vo tend to increase, due to an increase in sp coil 8, actingthrough the core 7 and'leve will increase the resistance of the carbpile Fraud so weaken the generator iie o maintain the voltagesubstantial y cons! The charging current flowing to the batm g ismaintained substantially constant by the action of the coil 18 on thecore 12, lever and carbon pile 10. When the battery can rent tends toincrease, coil 13 wiil the resistance of pile 10 in circuit a batteryand so decrease the battery on to maintain'it substantially constant.the battery becomes substantial as indicated by a relatively rapid backpressure; the charging current tend to decrease, causing a weakening o1coil 13, a decrease in the resistance carbon pile l0, and consequently,deer in the voltage drop there-across. This i decrease the strength ofthe opposing 14, which will thereby tend re: more effective and tend toinc as sistance of carbon pile 10, cans decrease in battery char ingthis way the battery 'charg more rapidly tapered of? at charge.

' At the beginning of the charging, the battery is in a dischargedcondition, or id its back pressure relatively low, the strength of thevoltage, coil 9 will be considerably less than normal, and hence it willoppose the voltage coil 8 to a less degree. This will enable the coil 8to maintain the generator voltage at a less value, so that, under theseconditions, less resistance is required in the battery circuit to limitthe battery current to the desired value, and consequently, less energyis lost in the variable resistances 10 and 18.

If desired, coil 9 may be connected across the carbon pile 10 and woundto aid the coil 8 instead of opposing it. This modification isillustrated in Fig. 2. In such case, when the battery is in a dischargedcondition, and resistance 10 is increased to limit the battery chargingcurrent, the strength of coil 9 will be increased and so aid coil 8 toreduce the generator voltage to a value below normal. Likewise, as shownin Fig. 2, voltage coil 14 may be connected across the batteryand woundto aid the current coil 13. In such case, as the voltage across thebattery rises at the end of the charge, coil 14 will increase instrength and enable the coil 13 to limit the battery current at a lesservalue, thus' more rapidly decreasing the battery charg- 1H0 current.

lVIany changes and modifications may be made without departing from thespirit and scope of the invention in its broader aspects, includingthose illustrated in my co-pending application, Serial No. 96,291 filedMay 9th 1916, and it is desired to cover all systems coming within thelanguage of the appended claims. I do not, however, make any claimherein to the employment of a voltage controlled generator regulator incombination with a regulator for varying the resistance of batterycircuit, except as such generator regulation is modified by such a coilas the coil 9, or except as such resistance variations in the batterycircuit are modified by such coils as the coil 14, as I am making claimsto such broader invention in my said pending application Sr. No. 96291.

What is claimed and desired to secure by Letters Patent is:

1. An electrical system of distribution having in combination a variablespeed generator, a storage battery connected to,be

supplied thereby, means regulating the generator voltage, a voltage coilcontrolling said means, means for changing the resistance in circuitwith the battery to regulate the battery charging current, and a coilaflecting said regulating means and acting to cause a deer-ease ingenerator voltage when the battery is in a discharged condition.

2. An electrical system of distribution having in combination a variablespeed generator, a storage battery connected to be supplied thereby,means regulating the generator voltage, a voltage coil controlling saidmeans, means for changing the resistance in circuit with the battery toregulate the battery charging current, and a coil afl'ecting saidregulating means and acting to cause a decrease in generator voltagewhen the battery is in a discharged condition, said last mentioned coilbeing responsive to changes in the battery back pressure.

3. An electrical system of distribution having in combination a variablespeed generator, a storage battery connected to be supplied thereby,means regulating the generator voltage, a voltage coil controlling saidmeans, means for changing. the resistance in circuit with the battery toregulate the battery charging current, a current coil controlling saidresistance changing means and a coil affecting said resistance changingmeans and acting to tend to weaken the battery charging current as thebattery becomes charged.

4. An electrical system of distribution having in combination a variablespeed generator, a storage battery connected to .be supplied thereby,means regulating the generator voltage, a voltage coil controlling saidmeans, means for changing the resistance in circuit with the battery toregulate the battery charging current, a current coil controlling saidresistance changing means and a coil affecting said resistance changingmeans and acting to tend to weaken the battery charging current as thebattery becomes charged, said last mentionedcoil being responsive tochanges in voltage drops across the resistance in circuit with thebattery.

5. An electrical system of distribution having in combination agenerator, a storage battery and translating devices connected to besupplied thereby in parallel, means for regulating the voltage upon thetranslating devices, means for regulating the gen erator voltage, avoltage coil controlling said last mentioned means, a coil aifectingsaid last mentioned means and acting to cause a. decrease in generatorvoltage when the battery is in a discharged condition, means forchanging the resistance in the battery circuit to regulate the batterycharging current, a current coil controlling said resistance changingmeans and a coil affecting said resistance changing means and acting totend to weaken the battery charging current ,as the battery beconiescharged.

'6. An electrical system of distribution having in combination agenerator, a storage battery and translating devices connected 'to besupplied thereby in parallel, means for regulating the voltage upon thetranslating devices, means for regulating the generator voltage, avoltage coil controllin said last mentioned means, a coil connecteacross the battery and opposing said voltage coil for affecting saidlast mentioned means and acting to cause a decrease in generator voltagewhen the battery is in a discharged ing current as the battery becomescharged,

condition, means for changing the resistance said last mentioned coilbeing connected in the battery circuit to regulate the battery acrossthe resistance in the battery circuit 16 charging current, a currentcoil controlling and wound to oppose said current coil.

said resistance changing means and a coil In testimony whereof, I havesigned my aflecting said resistance changing means and name to thisspecification.

acting to tend to Weaken the battery charg- GORHAM CROSBY.

